OK guys I've tried a couple of things. First, I always visit the full site when on my iPad, so that's not an issue. Second, I finally got back on my PC, but am still having the same problem. I click on someone's profile, click Rate, and nothing happens. So I've tried to return the rep rating favors, but no luck.

Edited to say I figured it out and resolved the problem. I had to click Switch to Full Version, even on my PC.